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Manage spectral objects

Source: R/manage_spec.R
manage_spec.Rd

c_spec() concatenates OpenSpecy objects. sample_spec() samples spectra from an OpenSpecy object. merge_map() merge two OpenSpecy objects from spectral maps.

Usage

c_spec(x, ...)

# S3 method for default
c_spec(x, ...)

# S3 method for OpenSpecy
c_spec(x, ...)

# S3 method for list
c_spec(x, range = NULL, res = 5, ...)

sample_spec(x, ...)

# S3 method for default
sample_spec(x, ...)

# S3 method for OpenSpecy
sample_spec(x, size = 1, prob = NULL, ...)

merge_map(x, ...)

# S3 method for default
merge_map(x, ...)

# S3 method for OpenSpecy
merge_map(x, ...)

# S3 method for list
merge_map(x, origins = NULL, ...)

Arguments

x

a list of OpenSpecy objects or of file paths.

range

a numeric providing your own wavenumber ranges or character argument called "common" to let c_spec() find the common wavenumber range of the supplied spectra. NULL will interpret the spectra having all the same wavenumber range.

res

defaults to NULL, the resolution you want the output wavenumbers to be.

size

the number of spectra to sample.

prob

probabilities to use for the sampling.

origins

a list with 2 value vectors of x y coordinates for the offsets of each image.

...

further arguments passed to submethods.

Value

c_spec() and sample_spec() return OpenSpecy objects.

See also

conform_spec() for conforming wavenumbers

Author

Zacharias Steinmetz, Win Cowger

Examples

# Concatenating spectra
spectra <- lapply(c(read_extdata("raman_hdpe.csv"),
                    read_extdata("ftir_ldpe_soil.asp")), read_any)
common <- c_spec(spectra, range = "common", res = 5)
range <- c_spec(spectra, range = c(1000, 2000), res = 5)

# Sampling spectra
tiny_map <- read_any(read_extdata("CA_tiny_map.zip"))
sampled <- sample_spec(tiny_map, size = 3)